Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Yoshihiro, Nakaya"'
Autor:
Keisuke Takiguchi, Atsushi Urikura, Tsukasa Yoshida, Yoshihiro Nakaya, Masahiro Endo, Takeshi Aramaki
Publikováno v:
Diagnostic and Interventional Radiology, Vol 26, Iss 4, Pp 333-338 (2020)
PURPOSEThe present study aimed to evaluate the scan technique of computed tomography (CT)-guided puncture procedures using partial exposure mode (PEM) on the radiation dose of the operator’s hand and image quality.METHODSRadiation dose was evaluate
Externí odkaz:
https://doaj.org/article/327f10791c984d01ac923e50e1171b9f
Autor:
Sayaka Ide, Takeshi Aramaki, Atsushi Urikura, Tsukasa Yoshida, Yoshihiro Nakaya, Masahiro Endo
Publikováno v:
Journal of Computer Assisted Tomography. 46:29-33
OBJECTIVE The aim of the study was to compare computed tomography (CT) angiography (CTA) imaging of deep inferior epigastric artery perforator (DIEP) using the ultrahigh-resolution CT (UHRCT) and conventional multidetector CT (MDCT). METHODS This ret
Autor:
Yoshihiro Nakaya, Kensei Shirata, Tsukasa Yoshida, Masahiro Endo, Atsushi Urikura, Yoichiro Hosokawa
Publikováno v:
Radiological physics and technology. 14(2)
We investigated the measurement error and repeatability of the apparent diffusion coefficient (ADC) obtained using thin-slice imaging. Diffusion-weighted images of an ice-water phantom were acquired using 1.5-T and 3.0-T scanners with 1-, 3-, and 5-m
Autor:
Tsukasa Yoshida, Yoshihiro Nakaya, Atsushi Urikura, Takeshi Aramaki, Masahiro Endo, Keisuke Takiguchi
Publikováno v:
Diagn Interv Radiol
PURPOSE: The present study aimed to evaluate the scan technique of computed tomography (CT)-guided puncture procedures using partial exposure mode (PEM) on the radiation dose of the operator’s hand and image quality. METHODS: Radiation dose was eva
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3947548373819f90d9b77b67d8d9a060
https://europepmc.org/articles/PMC7360079/
https://europepmc.org/articles/PMC7360079/
Autor:
Eiji Nishimaru, Tsukasa Yoshida, Yoshihiro Nakaya, Takanori Hara, Masahiro Endo, Atsushi Urikura
Publikováno v:
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB). 81
Purpose This study aimed to assess the noise characteristics of ultra-high-resolution computed tomography (UHRCT) with deep learning-based reconstruction (DLR). Methods Two different diameters of water phantom were scanned with three different resolu
Publikováno v:
Academic Radiology. 24:1380-1386
We aimed to compare the contrast enhancement between tumor and mammary-gland tissue to distinguish lesions in the super-early phase, during which minimal contrast media uptake is observed in mammary-gland tissue.Dynamic magnetic resonance imaging, in
Autor:
Atsushi Urikura, Yoshihiro Nakaya, Takanori Hara, Tsukasa Yoshida, Masahiro Endo, Takashi Hoshino, Eiji Nishimaru
Publikováno v:
Journal of Applied Clinical Medical Physics
Purpose We propose a novel method to assess overbeaming and overranging, as well as the effect of reducing longitudinal exposure range, by using a dynamic z‐collimator in area detector computed tomography. Methods and materials A 500‐mm diameter
Autor:
Atsushi Urikura, Yoshihiro Nakaya, Katsuhiro Ichikawa, Masahiro Endo, Takashi Hoshino, Takanori Hara, Tsukasa Yoshida, Eiji Nishimaru
Publikováno v:
Australasian physicalengineering sciences in medicine. 42(2)
To measure the effective temporal resolution (eTR) and image quality for three reconstruction modes for non-helical volume scanning in area detector CT. Temporal sensitivity profiles (TSPs) were obtained and the full width of the TSP at half maximum
Autor:
Tsukasa Yoshida, Yoshihiro Nakaya, Atsushi Urikura, Katsuhiro Ichikawa, Takanori Hara, Takashi Hoshino, Eiji Nishimaru
Publikováno v:
Physica Medica. 32:992-998
Objective This study aims to assess low-contrast image quality using a low-contrast object specific contrast-to-noise ratio (CNR LO ) analysis for iterative reconstruction (IR) computed tomography (CT) images. Methods A phantom composed of low-contra
Autor:
Tsukasa Yoshida, Yoshihiro Nakaya, Kenichi Hirosawa, Takahiro Ito, Keisuke Takiguchi, Atsushi Urikura
Publikováno v:
Japanese Journal of Radiological Technology. 72:1137-1143
Objective The purpose of this study was to assess the dose reduction and the image quality using bismuth sheets during the computed tomography fluoroscopy (CTF). Materials and methods The bismuth sheets of 1-mm thick were put on the upper mylar ring